Related Experiment Video
Updated: Feb 14, 2026
10:22
Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements
Published on: September 7, 2019
8.8K
Selection criteria for oxidation method in total organic carbon measurement
GeunSeok Yoon1, Sang-Min Park1, Heuiwon Yang1
1Department of Environmental Engineering and Soil Environment Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin, Jeonju, Jeollabukdo 561-756, Republic of Korea.
Chemosphere
|February 18, 2018
Summary
High temperature combustion (HTC) and wet chemical oxidation (WCO) are methods for measuring total organic carbon (TOC). WCO is unsuitable for halogenated compounds, unlike HTC, due to oxidation inhibition.
Area of Science:
- Environmental Chemistry
- Analytical Chemistry
Background:
- Accurate measurement of total organic carbon (TOC) is crucial for water quality assessment.
- Existing oxidation methods, high temperature combustion (HTC) and wet chemical oxidation (WCO), lack clear selection criteria.
- The chemical structure of organic matter influences the efficiency of TOC oxidation methods.
Purpose of the Study:
- To investigate the influence of chemical structure on the selection of oxidation methods for TOC analysis.
- To compare the oxidation efficiency of HTC and WCO for various organic compounds.
- To identify limitations of WCO in TOC determination.
Main Methods:
- Comparative analysis of TOC measurement using HTC and WCO.
- Evaluation of oxidation efficiency for diverse organic compounds, including natural organic matter, dyes, pharmaceuticals, and halogenated compounds (perfluorooctanoic acid, trifluoroacetic acid).
Main Results:
- Both HTC and WCO demonstrated similar oxidation efficiencies for non-degradable compounds like natural organic matter, dyes, and pharmaceuticals.
- WCO oxidized only a fraction of carbon in halogenated compounds, yielding significantly lower TOC values compared to HTC.
- Lower WCO efficiency for halogenated compounds is attributed to the electronegativity of halogens and the strength of carbon-halogen bonds.
Conclusions:
- WCO is suitable for TOC determination in waters containing most organic compounds.
- WCO is not appropriate for quantifying TOC in samples with certain halogenated organic compounds.
- HTC is a more reliable method for TOC analysis when halogenated compounds are present.
More Related Videos
Related Concept Videos
01:19Oxidation and Reduction of Organic Molecules
9.5K
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
The removal of an electron from a molecule, results in a...
9.5K
01:28Criteria for Causality: Bradford Hill Criteria - II
1.3K
The Bradford Hill criteria serve as guidelines for establishing causative links in epidemiological research. Beyond Strength, Consistency, Specificity, and Temporality, key criteria also include Biological Gradient, Plausibility, Coherence, Experiment, and Analogy. These principles assist scientists in assessing the likelihood of causation in complex biological contexts. Below is a summary of these concepts:
1.3K
01:30Criteria for Causality: Bradford Hill Criteria - I
1.2K
The Bradford Hill criteria are a group of principles that provide a framework to determine a causal relationship between a specific factor and a disease. There are nine criteria that are pivotal in assessing causality in epidemiological studies. Here's a closer look at Strength, Consistency, Specificity, and Temporality criteria with definitions and examples:
1.2K
03:14Oxidation Numbers
43.3K
In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules.
43.3K
01:15Phase I Reactions: Oxidation of Carbon-Heteroatom and Miscellaneous Systems
443
Oxidative reactions are pivotal in metabolizing numerous compounds, including pharmaceutical drugs. These reactions often occur in carbon-heteroatom systems, such as carbon-nitrogen, carbon-sulfur, and carbon-oxygen.
In carbon-nitrogen systems, aliphatic and aromatic amines can undergo oxidative reactions. Secondary and tertiary amines, like those found in tricyclic antidepressants, can undergo N-dealkylation, a process that involves the oxidation of the alkyl group. In addition, oxidative...
In carbon-nitrogen systems, aliphatic and aromatic amines can undergo oxidative reactions. Secondary and tertiary amines, like those found in tricyclic antidepressants, can undergo N-dealkylation, a process that involves the oxidation of the alkyl group. In addition, oxidative...
443
01:19Phase I Reactions: Oxidation of Aliphatic and Aromatic Carbon-Containing Systems
752
Phase I biotransformation reactions are integral to drug metabolism, predominantly involving oxidative, reductive, and hydrolytic transformations. Chief among these are oxidative reactions, which enhance the hydrophilicity of xenobiotics and introduce polar functional groups to facilitate their elimination from the body.
Oxidation reactions are fundamental in aromatic carbon-containing systems. An example is the hydroxylation of phenobarbital, a process that transforms it into...
Oxidation reactions are fundamental in aromatic carbon-containing systems. An example is the hydroxylation of phenobarbital, a process that transforms it into...
752